<template>
    <div class="app-container">
        <el-row :gutter="30" :style="{height: '400px', width: '600px'}">
            <div class="chart" ref="chart" :style="{height:'100%',width:'100%'}"></div>
        </el-row>
    </div>
</template>

<script>
import echarts from 'echarts'
require('echarts/theme/macarons') // echarts theme
require('echarts/map/js/china')
import resize from '@/views/dashboard/mixins/resize'

// 用于给地图上的城市显示的经纬度坐标（资源文件）
const geoCoordMap = {
    '上海': [121.4648, 31.2891],
    '东莞': [113.8953, 22.901],
    '东营': [118.7073, 37.5513],
    '中山': [113.4229, 22.478],
    '临汾': [118.3118, 35.2936],
    '临沂': [121.4648, 31.2891],
    '丹东': [124.541, 40.4242],
    '丽水': [119.5642, 28.1854],
    '乌鲁木齐': [87.9236, 43.5883],
    '佛山': [112.8955, 23.1097],
    '保定': [115.0488, 39.0948],
    '兰州': [103.5901, 16.3043],
    '包头': [110.3467, 41.4899],
    '北京': [116.4551, 40.2539],
    '北海': [109.314, 21.6211],
    '南京': [118.479, 31.9208],
    '南宁': [108.479, 23.1152],
    '南昌': [116.0046, 28.6633],
    '南通': [121.1023, 32.1625],
    '厦门': [118.1689, 24.6478],
    '台州': [121.1353, 28.6688],
    '合肥': [117.29, 32.0581],
    '呼和浩特': [111.4124, 40.4901],
    '咸阳': [108.4131, 34.8706],
    '哈尔滨': [127.9688, 45.368],
    '唐山': [118.4766, 39.6826],
    '嘉兴': [120.9155, 30.6354],
    '大同': [113.7854, 39.8035],
    '大连': [122.2229, 39.4409],
    '天津': [117.4219, 39.4189],
    '太原': [112.3352, 37.9413],
    '威海': [121.9482, 37.1393],
    '宁波': [121.5967, 29.6466],
    '宝鸡': [107.1826, 34.3433],
    '宿迁': [118.5535, 33.7775],
    '常州': [119.4543, 31.5582],
    '广州': [113.5107, 23.2196],
    '廊坊': [116.521, 39.0509],
    '延安': [109.1052, 36.4252],
    '张家口': [115.1477, 40.8527],
    '徐州': [117.5208, 34.3268],
    '德州': [116.6858, 37.2107],
    '惠州': [114.6204, 23.1647],
    '成都': [103.9526, 30.7617],
    '扬州': [119.4653, 32.8162],
    '承德': [117.5757, 41.4075],
    '拉萨': [91.1865, 30.1465],
    '无锡': [120.3442, 31.5527],
    '日照': [119.2786, 35.5023],
    '昆明': [102.9199, 25.4663],
    '杭州': [119.5313, 29.8773],
    '枣庄': [117.323, 34.8926],
    '柳州': [109.3799, 24.9774],
    '株洲': [113.5327, 27.0319],
    '武汉': [114.3896, 30.6628],
    '汕头': [117.1692, 23.3405],
    '江门': [112.6318, 22.1484],
    '沈阳': [123.1238, 42.1216],
    '沧州': [116.8286, 38.2104],
    '河源': [114.917, 23.9722],
    '泉州': [118.3228, 25.1147],
    '泰安': [117.0264, 36.0516],
    '泰州': [120.0586, 32.5525],
    '济南': [117.1582, 36.8701],
    '济宁': [116.8286, 35.3375],
    '海口': [110.3893, 19.8516],
    '淄博': [118.0371, 36.6064],
    '淮安': [118.927, 33.4039],
    '深圳': [114.5435, 22.5439],
    '清远': [112.9175, 24.3292],
    '温州': [120.498, 27.8119],
    '渭南': [109.7864, 35.0299],
    '湖州': [123.1238, 42.1216],
    '湘潭': [112.5439, 27.7075],
    '滨州': [117.8174, 37.4963],
    '潍坊': [119.0918, 36.524],
    '烟台': [120.7397, 37.5128],
    '玉溪': [101.9312, 23.8898],
    '珠海': [113.7305, 22.1155],
    '盐城': [120.2234, 33.5577],
    '盘锦': [121.9482, 41.0449],
    '石家庄': [114.4995, 38.1006],
    '福州': [119.4543, 25.9222],
    '秦皇岛': [119.2126,40.0232],
    '绍兴': [120.564, 29.7565],
    '聊城': [115.9167, 36.4032],
    '肇庆': [112.1265, 23.5822],
    '舟山': [122.2559,30.2234],
    '苏州': [120.6519, 31.3989],
    '莱芜': [117.6526, 36.2714],
    '菏泽': [115.6201, 35.2057],
    '营口': [122.4316, 40.4297],
    '葫芦岛': [120.1575, 40.578],
    '衡水': [115.8838, 37.7161],
    '衢州': [118.6853, 28.8666],
    '西宁': [101.4038, 36.8207],
    '西安': [109.1162, 34.2004],
    '贵阳': [106.6992, 26.7682],
    '连云港': [119.1248, 34.552],
    '邢台': [114.8071, 37.2821],
    '邯郸': [114.4775, 36.535],
    '郑州': [113.4668, 34.6234],
    '鄂尔多斯': [108.9734, 39.2487],
    '重庆': [107.7539, 30.1904],
    '金华': [120.0037, 29.1028],
    '铜川': [109.0393, 35.1947],
    '银川': [106.3586, 38.1775],
    '镇江': [119.4763, 31.9702],
    '长春': [125.8154, 44.2584],
    '长沙': [113.0823, 28.2568],
    '长治': [112.8625, 36.4746],
    '阳泉': [113.4778, 38.0951],
    '青岛': [120.4651, 36.3373],
    '韶关': [113.7964, 24.7028]
}
const BJData = [
    [{name: '北京'}, {name: '上海', value: 95}],
    [{name: '北京'}, {name: '广州', value: 90}],
    [{name: '北京'}, {name: '大连', value: 80}],
    [{name: '北京'}, {name: '南宁', value: 70}],
    [{name: '北京'}, {name: '南昌', value: 60}],
    [{name: '北京'}, {name: '拉萨', value: 50}],
    [{name: '北京'}, {name: '长春', value: 40}],
    [{name: '北京'}, {name: '包头', value: 30}],
    [{name: '北京'}, {name: '重庆', value: 20}],
    [{name: '北京'}, {name: '常州', value: 10}],
]

const SHData = [
    [{name: '上海'}, {name: '包头', value: 95}],
    [{name: '上海'}, {name: '昆明', value: 90}],
    [{name: '上海'}, {name: '广州', value: 80}],
    [{name: '上海'}, {name: '郑州', value: 70}],
    [{name: '上海'}, {name: '长春', value: 60}],
    [{name: '上海'}, {name: '重庆', value: 50}],
    [{name: '上海'}, {name: '长沙', value: 40}],
    [{name: '上海'}, {name: '北京', value: 30}],
    [{name: '上海'}, {name: '丹东', value: 20}],
    [{name: '上海'}, {name: '大连', value: 10}],
]

const GZData = [
    [{name: '广州'}, {name: '福州', value: 95}],
    [{name: '广州'}, {name: '太原', value: 90}],
    [{name: '广州'}, {name: '长春', value: 80}],
    [{name: '广州'}, {name: '重庆', value: 70}],
    [{name: '广州'}, {name: '西安', value: 60}],
    [{name: '广州'}, {name: '成都', value: 50}],
    [{name: '广州'}, {name: '常州', value: 40}],
    [{name: '广州'}, {name: '北京', value: 30}],
    [{name: '广州'}, {name: '北海', value: 20}],
    [{name: '广州'}, {name: '海口', value: 10}],
]

let color = ['#a6c84c', '#ffa022', '#46bee9']

// 模拟出发城市到各大目的地地所对应的路线图
// 用的是Path:// SVG画的矢量图
const planePath = 'path://M1705.06,1318.313v-89.254l-319.9-221.799l0.073-208.063c0.521-84.662-26.629-121.796-63.961-121.491c-37.332-0.305-64.482,36.829-63.961,121.491l0.073,208.063l-319.9,221.799v89.254l330.343-157.288l12.238,241.308l-134.449,92.931l0.531,42.034l175.125-42.917l175.125,42.917l0.531-42.034l-134.449-92.931l12.238-241.308L1705.06,1318.313z'
export default {
    name: 'chartDemo',
    mixins: [resize],
    data() {
        return {
            chart: null
        }
    },
    mounted() {
        this.$nextTick(() => {
            this.initChart()
        })
    },
    beforeDestroy() {
        if (!this.chart) {
            return
        }
        this.chart.dispose()
        this.chart = null
    },
    methods: {
        initChart() {
            this.chart = echarts.init(this.$refs['chart'], 'macarons')
            this.setOptions(this.chartData)
            this.chart.on('click',function(params) {
                console.log(params)
            })
            this.chart.on('legendselectchanged', function(params) {
                console.log(params)
            })
        },
        setOptions() {
            let series = []
            let arr = [['北京', BJData], ['上海', SHData], ['广州', GZData]]
            arr.forEach((item, index) => {
                series.push({
                    name: item[0] + 'top10',
                    type: 'lines',
                    zlevel: 1,
                    effect: {
                        show: true,
                        period: 6,
                        trailLength: 0.7,
                        color: '#fff',
                        symbolSize: 3
                    },
                    lineStyle: {
                        color: color[index],
                        width: 0,
                        curveness: 0.2
                    },
                    data: this.convertData(item[1])
                },
                {
                    name: item[0] + 'top10',
                    type: 'lines',
                    zlevel: 2,
                    effect: {
                        show: true,
                        period: 6,
                        trailLength: 0,
                        symbol: planePath,
                        symbolSize: 10
                    },
                    lineStyle: {
                        color: color[index],
                        width: 1,
                        opacity: 0.4,
                        curveness: 0.2
                    },
                    data: this.convertData(item[1])
                },{
                    name: item[0] + 'top10',
                    type: 'effectScatter',
                    coordinateSystem: 'geo',
                    zlevel: 2,
                    rippleEffect: {
                        brushType: 'stroke'
                    },
                    label: {
                        normal: {
                            show: true,
                            position: 'right',
                            formatter: '{b}'
                        }
                    },
                    symbolSize: function (val) {
                        return val[2] / 8
                    },
                    itemStyle: {
                        normal: {
                            color: color[index]
                        }
                    },
                    data: item[1].map(function (dataItem) {
                        return {
                            name: dataItem[1].name,
                            value: geoCoordMap[dataItem[1].name].concat([dataItem[1].value])
                        }
                    })
                })
            })
            console.log(series)
            this.chart.setOption({
                backgroundColor: '#404a59',
                title: {
                    text: '北上广最佳前10航行路线图',
                    subtext: '数据纯属虚构',
                    left: 'center',
                    textStyle: {
                        color: '#fff'
                    }
                },
                tooltip: {
                    trigger: 'item'
                },
                legend: {
                    orient: 'vertical',
                    show: true,
                    top: 'bottom',
                    left: 'right',
                    data: ['北京top10', '上海top10', '广州top10'],
                    textStyle: {
                        color: '#fff'
                    },
                    selectedMode: 'single'
                },
                geo: {
                    map: 'china',
                    label: {
                        show: false
                    },
                    roam: true,
                    itemStyle: {
                        areaColor: '#323c48',
                        borderColor: '#404a59'
                    },
                    emphasis: {
                        label: {
                            show: false
                        },
                        itemStyle: {
                            areaColor: '#2a333d'
                        }
                    }
                },
                series: series
            });
        },
        //用于转换成特定格式的数据
        convertData(data) {
            let res = []
            for (let i = 0; i < data.length; i++) {
                let dataItem = data[i]
                let fromCoord = geoCoordMap[dataItem[0].name]
                let toCoord = geoCoordMap[dataItem[1].name]
                if(fromCoord && toCoord) {
                    res.push({
                        fromName: dataItem[0].name,
                        toName: dataItem[1].name,
                        coords: [fromCoord, toCoord]
                    })
                }
            }
            return res
        }
    },
}
</script>